<template>
  <transition name="todo" appear>
    <li>
      <label>
        <input
          type="checkbox"
          :checked="todo.done"
          @change="handleCheck(todo.id)"
        />
        <!-- 如下代码也能实现功能，但是不太推荐，因为有点违反原则，因为修改了props -->
        <!-- <input type="checkbox" v-model="todo.done"/> -->
        <span v-show="!todo.isEdit">{{ todo.title }}</span>
        <input
          type="text"
          v-show="todo.isEdit"
          :value="todo.title"
          @blur="handleBlur(todo, $event)"
          ref="inputTitle"
        />
      </label>
      <button class="btn btn-danger" @click="handleDelete(todo.id)">
        删除
      </button>
      <button
        v-show="!todo.isEdit"
        class="btn btn-edit"
        @click="handleEdit(todo)"
      >
        编辑
      </button>
    </li>
  </transition>
</template>

<script>
import pubsub from "pubsub-js";
export default {
  name: "Item",
  //声明接受todo对象
  props: ["todo", "checkTodo", "deleteTodo", "updateTodo"],
  data() {
    return {};
  },
  methods: {
    handkeCheck(id) {
      //通知app组件修改todo.done的值修改取反
      console.log(id);
      // this.$bus.$emit("checkTodo", id);
      // this.checkTodo(id);
      pubsub.publish("checkTodo", id);
    },
    handleDelet(id) {
      if (confirm("确定删除吗?")) {
        // this.deleteTodo(id);
        // this.$bus.$emit("deleteTodo", id);
        pubsub.publish("deleteTodo", id);
        console.log("删除的id", id);
      }
    },
    handleEdit(todo) {
      if (todo.hasOwnProperty.call("isEdit", true)) {
        todo.isEdit = true;
      } else {
        this.$set(todo, "isEdit", true);
        console.log("@", todo);
      }
      this.$nextTick(function () {
        this.$refs.inputTitle.focus();
      });
      // todo.isEdit = true
    },
    //真正执行修改
    handleBlur(todo, e) {
      todo.isEdit = false;
      if (!e.target.value.trim()) return alert("输入不能为空!");
      this.$bus.$emit("updateTodo", todo.id, e.target.value);
    },
  },
};
</script>

<style scoped>
.todo-enter-active {
  animation: bug 1s;
}
.todo-leave-active {
  animation: bug 1s reverse;
}

@keyframes bug {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0px);
  }
}
/*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  margin-right: 10px;
  float: right;
  display: none;
  margin-top: 3px;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}
li:hover button {
  display: block;
  background-color: rgb(93, 133, 219);
}
</style>